Carl jagerspacher



UNITED sans an cri erio CARL JAGERSPACHER, OF BASEL, SWITZERLAND,ASSIGNOR TO SOCIETY OF CHEMICAL INDUSTRY IN BASLE, 0F BASEL,SWITZERLAND. I

A20 DYESTUFFS DYEING ON MORDANIS AND PROCESS OF MAKING SAME.

'No Drawing.

To all whom it may concern:

Be it known that I, CARL JAGERSPACHER, a citizen of the Swiss Republic,and resident of Basel, Switzerland, have invented new and useful AzoDyestuffs Dyeing on Mordants and Processes of Making Same, of which thefollowing is a full, clear, and exact specification.

I have found that by combining aromatic diazocompounds, which do notcontain a hydroxyl group in an ortho-position relatively to the diazogroup, with 1.8-dioxynaphthalenesulfocarboxylic acids, there areobtained new azodyestuifs dyeing on mordants, which are particularlysuitable for rinting cotton with chromium mordants.

sc dyestufis constitute, in a dry state, brown-red to black powders,dissolve in water with red to violet colorations and in concentratedsulfuric acid to violet solutions,

dye wool in an acid bath red to blue tints becoming, on subsequentchroming, fast blue to black, and produce fast blue to black prints,when printed on cotton with chromium mordants.

The invention is illustrated by the following examples:

Example 1.

13.7 parts of anthranilic acid are diazotized in known manner and theresulting diazocompound is poured into an acetic solution of 28.4 partsof 1.8-dioXynaphthalene-3- sulfo-6-carboxylic acid while stirring. Thecombination being achieved, the dyestufi is salted out, filtered off anddried.

It constitutes in a dry state, a brown-red powder, which dissolves inwater to red solutions and in concentrated sulfuric acid to violetsolutions and dye wool, in an acid bath, pure blue-red tints turning, onsubsequent chroming, to a fast blue. When printed on cotton withchromium mordants, it gives fast gray-blue prints.

Emample 2.

Specification of Letters Patent.

Patented Dec. 2, 1919.

Application filed May 14, 1919. Serial No. 296,989.

after the mass is boiled for 10 minutes in order to split off the acetylgroup. The mass 18 then acidified with hydrochloric acid, whereby thedyestufi' precipitates entirely.

The dyestuff constitutes, in a dry state, a green-black powder, whichdissolves in water to violet solutions and in concentrated sulfuric acidto red-violet solutions. It dyes wool, in an acid bath, violet-bluetints turning, on subsequent chroming, to a fast gray, and produces,when printed on cotton with chromium mordants, black prints fast tosoaping, chlorin and light.

What I claim is:

1. The herein described process for the manufacture of azodyestufisdying on mordants, which consists in combining aromatic diazo compounds,which do not contain a hydroxyl group in an ortho position relativelytothe azo group, with 1 :S-dioxynaph thalene-sulfo-carboxylic acids.

2. As new products, the herein described azodyestufis derived from1.8-dioxynaphthalene-sulfocarboxylic acids and aromatic diazo compounds,which do not contain a hydroxyl group in an orthoposition relatively tothe azogroup, which constitute, in a dry state, brown red to blackpowders, dissolve in water with red to violet coloration, dye wool, inan acid bath, red to blue tints becoming, on subsequent chroming, fastblue to black and produce, when printed on cotton with chromin mordants,fast blue to black prints.

3. As a new article of manufacture, the herein described azodyestufi'resulting from the combination of para-acetylaminodiazobenzine with1.8-dioxynaphthalene-3-sulfo- G-carboxylic acid and subsequent splittingoff of the acetyl group by saponification, which constitutes, in a drystate, a green-black powder, is soluble in water to violet solutions andin concentrated sulfuric acid to red-violet solutions, dyes wool, in anacid bath violet blue tints turning, on subsequent chroming, to a fastgray and gives, when printed on cotton with chromium mordants, blackprints fast to soaping, chlorin and light.

'In witness whereof I have hereunto signed my name this 16th day ofApril, 1919, in the presence of two subscribing witnesses.

CARL JAGERSPACHER.

Witnesses:

Sco'r'r TAGGART, AMAND Brenna.

